LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

This update for libressl to version 2.8.0 fixes the following issues :

Security issues fixed :

  - CVE-2018-12434: Avoid a timing side-channel leak when     generating DSA and ECDSA signatures. (boo#1097779)

  - Reject excessively large primes in DH key generation.

Other bugs fixed :

  - Fixed a pair of 20+ year-old bugs in     X509_NAME_add_entry.

  - Tighten up checks for various X509_VERIFY_PARAM     functions, 'poisoning' parameters so that an unverified     certificate cannot be used if it fails verification.

  - Fixed a potential memory leak on failure in     ASN1_item_digest.

  - Fixed a potential memory alignment crash in     asn1_item_combine_free.

  - Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and     SSL3_FLAGS_POP_BUFFER flags in write path, simplifying     IO paths.

  - Removed SSL_OP_TLS_ROLLBACK_BUG buggy client     workarounds.

  - Added const annotations to many existing APIs from     OpenSSL, making interoperability easier for downstream     applications.

  - Added a missing bounds check in c2i_ASN1_BIT_STRING.

  - Removed three remaining single DES cipher suites.

  - Fixed a potential leak/incorrect return value in DSA     signature generation.

  - Added a blinding value when generating DSA and ECDSA     signatures, in order to reduce the possibility of a     side-channel attack leaking the private key.

  - Added ECC constant time scalar multiplication support.

  - Revised the implementation of RSASSA-PKCS1-v1_5 to match     the specification in RFC 8017.

This update for libressl to version 2.8.0 fixes the following issues :

Security issues fixed :

  - CVE-2018-12434: Avoid a timing side-channel leak when     generating DSA and ECDSA signatures. (boo#1097779)

  - Reject excessively large primes in DH key generation.

  - CVE-2018-8970: Fixed a bug in int_x509_param_set_hosts,     calling strlen() if name length provided is 0 to match     the OpenSSL behaviour. (boo#1086778)

  - Fixed an out-of-bounds read and crash in DES-fcrypt     (boo#1065363)

You can find a detailed list of changes [here](https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.8.0-rel notes.txt).

ID	Name	Product	Family	Severity
123282	openSUSE Security Update : libressl (openSUSE-2019-644)	Nessus	SuSE Local Security Checks	medium
112267	openSUSE Security Update : libressl (openSUSE-2018-953)	Nessus	SuSE Local Security Checks	high
112264	openSUSE Security Update : libressl (openSUSE-2018-950)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2018-12434

medium

Tenable Plugins

medium

high

medium